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OpenStudy (anonymous):
what is 2 + 2 + 1 - 1 =
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OpenStudy (anonymous):
no its 4
OpenStudy (anonymous):
\[2 + 2 + 1 - 1 \rightarrow 2 + 2 = 4 \rightarrow 4 + 1 = 5 \rightarrow 5 - 1 = 4\]
OpenStudy (anonymous):
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